http://www.jonite.us/products/toilet-grates for drain cover (grate) is manhole cover. Say "manhole cover" and images of spies/heros using the underground sewage system popping out of manhole cover in Hollywood films appear.Historically since that time Man invented the sewage system since the Roman Times to drain water and urban waste away for sanitation purposes, manhole covers (drain covers or grates as we would prefer to call them [...]Leer m?s...